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Pearl H, Fleischer CC. Association between altered metabolism and genetic mutations in human glioma. Cancer Rep (Hoboken) 2023; 6:e1799. [PMID: 36916606 PMCID: PMC10172161 DOI: 10.1002/cnr2.1799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 02/20/2023] [Accepted: 02/24/2023] [Indexed: 03/15/2023] Open
Abstract
BACKGROUND Molecular markers for classification of gliomas include isocitrate dehydrogenase (IDH) mutations and codeletion of chromosomal arms 1p and 19q (1p/19q). While mutations in IDH enzymes result in the well-characterized production of oncometabolite 2-hydroxyglutarate, dysregulation of other metabolites in IDH tumors is less characterized. Similarly, the effects of 1p/19q codeletion on cellular metabolism are also unclear. AIM This study aimed to quantify changes in tumor metabolites in human glioma tissue as a function of both IDH mutation and 1p/19q codeletion. METHODS AND RESULTS Deidentified human glioma tissue and associated clinical data were obtained from the Emory University Winship Cancer Institute tissue biobank from 14 patients (WHO grades II, III, and IV; seven female and seven male). Proton (1 H) high-resolution magic angle spinning (HR-MAS) nuclear magnetic resonance (NMR) spectroscopy data were acquired using a 600 MHz Bruker AVANCE III NMR spectrometer. Metabolite concentrations were calculated using LCModel. Differences in metabolite concentrations as a function of IDH mutation, 1p/19q codeletion, and survival status were determined using Mann-Whitney U tests. Concentrations of alanine, glutamine, and glutamate were significantly lower in glioma tissue with IDH mutations compared to tissue with IDH wildtype. Additionally, glutamate concentration was significantly lower in glioma tissue with 1p/19q codeletion compared to intact 1p/19q. Exploratory analysis revealed alanine concentration varied significantly as a function of survival status. CONCLUSIONS Given the emerging landscape of glioma treatments that target metabolic dysregulation, an improved understanding of altered metabolism in molecular sub-types of gliomas, including those with IDH mutation and 1p/19q codeletion, is an important consideration for treatment stratification and personalized medicine.
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Affiliation(s)
- Hannah Pearl
- College of Arts and Sciences, Tufts University, Medford, Massachusetts, USA
| | - Candace C Fleischer
- Department of Radiology and Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia, USA.,Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
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Multisite Kinetic Modeling of (13)C Metabolic MR Using [1-(13)C]Pyruvate. Radiol Res Pract 2014; 2014:871619. [PMID: 25548671 PMCID: PMC4274847 DOI: 10.1155/2014/871619] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Revised: 11/06/2014] [Accepted: 11/13/2014] [Indexed: 12/03/2022] Open
Abstract
Hyperpolarized 13C imaging allows real-time in vivo measurements of metabolite levels. Quantification of metabolite conversion between [1-13C]pyruvate and downstream metabolites [1-13C]alanine, [1-13C]lactate, and [13C]bicarbonate can be achieved through kinetic modeling. Since pyruvate interacts dynamically and simultaneously with its downstream metabolites, the purpose of this work is the determination of parameter values through a multisite, dynamic model involving possible biochemical pathways present in MR spectroscopy. Kinetic modeling parameters were determined by fitting the multisite model to time-domain dynamic metabolite data. The results for different pyruvate doses were compared with those of different two-site models to evaluate the hypothesis that for identical data the uncertainty of a model and the signal-to-noise ratio determine the sensitivity in detecting small physiological differences in the target metabolism. In comparison to the two-site exchange models, the multisite model yielded metabolic conversion rates with smaller bias and smaller standard deviation, as demonstrated in simulations with different signal-to-noise ratio. Pyruvate dose effects observed previously were confirmed and quantified through metabolic conversion rate values. Parameter interdependency allowed an accurate quantification and can therefore be useful for monitoring metabolic activity in different tissues.
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Kandil S, Brennan L, McBean GJ. Glutathione depletion causes a JNK and p38MAPK-mediated increase in expression of cystathionine-γ-lyase and upregulation of the transsulfuration pathway in C6 glioma cells. Neurochem Int 2010; 56:611-9. [DOI: 10.1016/j.neuint.2010.01.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Accepted: 01/05/2010] [Indexed: 11/27/2022]
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Zierhut ML, Yen YF, Chen AP, Bok R, Albers MJ, Zhang V, Tropp J, Park I, Vigneron DB, Kurhanewicz J, Hurd RE, Nelson SJ. Kinetic modeling of hyperpolarized 13C1-pyruvate metabolism in normal rats and TRAMP mice. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2010; 202:85-92. [PMID: 19884027 PMCID: PMC2833325 DOI: 10.1016/j.jmr.2009.10.003] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2009] [Revised: 10/07/2009] [Accepted: 10/07/2009] [Indexed: 05/04/2023]
Abstract
PURPOSE To investigate metabolic exchange between (13)C(1)-pyruvate, (13)C(1)-lactate, and (13)C(1)-alanine in pre-clinical model systems using kinetic modeling of dynamic hyperpolarized (13)C spectroscopic data and to examine the relationship between fitted parameters and dose-response. MATERIALS AND METHODS Dynamic (13)C spectroscopy data were acquired in normal rats, wild type mice, and mice with transgenic prostate tumors (TRAMP) either within a single slice or using a one-dimensional echo-planar spectroscopic imaging (1D-EPSI) encoding technique. Rate constants were estimated by fitting a set of exponential equations to the dynamic data. Variations in fitted parameters were used to determine model robustness in 15 mm slices centered on normal rat kidneys. Parameter values were used to investigate differences in metabolism between and within TRAMP and wild type mice. RESULTS The kinetic model was shown here to be robust when fitting data from a rat given similar doses. In normal rats, Michaelis-Menten kinetics were able to describe the dose-response of the fitted exchange rate constants with a 13.65% and 16.75% scaled fitting error (SFE) for k(pyr-->lac) and k(pyr-->ala), respectively. In TRAMP mice, k(pyr-->lac) increased an average of 94% after up to 23 days of disease progression, whether the mice were untreated or treated with casodex. Parameters estimated from dynamic (13)C 1D-EPSI data were able to differentiate anatomical structures within both wild type and TRAMP mice. CONCLUSIONS The metabolic parameters estimated using this approach may be useful for in vivo monitoring of tumor progression and treatment efficacy, as well as to distinguish between various tissues based on metabolic activity.
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Affiliation(s)
- Matthew L. Zierhut
- UCSF/UCB Joint Graduate Group in Bioengineering, San Francisco, CA, United States
- UCSF Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, San Francisco, CA, United States
| | - Yi-Fen Yen
- Global Applied Sciences Laboratory, GE Healthcare, CA, United States
| | - Albert P. Chen
- UCSF Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, San Francisco, CA, United States
| | - Robert Bok
- UCSF Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, San Francisco, CA, United States
| | - Mark J. Albers
- UCSF/UCB Joint Graduate Group in Bioengineering, San Francisco, CA, United States
- UCSF Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, San Francisco, CA, United States
| | - Vickie Zhang
- UCSF Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, San Francisco, CA, United States
| | - Jim Tropp
- Global Applied Sciences Laboratory, GE Healthcare, CA, United States
| | - Ilwoo Park
- UCSF/UCB Joint Graduate Group in Bioengineering, San Francisco, CA, United States
- UCSF Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, San Francisco, CA, United States
| | - Daniel B. Vigneron
- UCSF/UCB Joint Graduate Group in Bioengineering, San Francisco, CA, United States
- UCSF Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, San Francisco, CA, United States
| | - John Kurhanewicz
- UCSF/UCB Joint Graduate Group in Bioengineering, San Francisco, CA, United States
- UCSF Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, San Francisco, CA, United States
| | - Ralph E. Hurd
- Global Applied Sciences Laboratory, GE Healthcare, CA, United States
| | - Sarah J. Nelson
- UCSF/UCB Joint Graduate Group in Bioengineering, San Francisco, CA, United States
- UCSF Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, San Francisco, CA, United States
- Corresponding author. Address: UCSF/UCB Joint Graduate Group in Bioengineering, University of California, San Francisco, P.O. Box 2532, QB3 Bldg, 1700 4th Street, San Francisco, CA 94143-2532, United States. Fax: +1 415 514 2550. (S.J. Nelson)
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Brennan L, Alves PM, Hewage C, Malthouse JPG, McBean GJ. Impact of the gliotoxin l-serine-O-sulphate on cellular metabolism in cultured rat astrocytes. Neurochem Int 2006; 48:739-45. [PMID: 16458390 DOI: 10.1016/j.neuint.2005.12.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2005] [Revised: 12/12/2005] [Accepted: 12/20/2005] [Indexed: 10/25/2022]
Abstract
L-serine-O-sulphate is a member of a group of amino acids collectively called gliotoxins and is a substrate for the high affinity sodium-dependent glutamate transporters. Previous studies have shown that it is toxic to primary cultures of astrocytes but the mode of toxicity is unknown. The current study demonstrates that L-serine-O-sulphate, at a sub-toxic concentration (400 microM), causes significant disruption to glucose and alanine metabolism in cultures of rat cortical astrocytes. More specifically, using (13)C NMR spectroscopy a significant reduction in labelled end products from [1-(13)C]glucose and [3-(13)C]alanine was found in the presence of L-serine-O-sulphate. Additionally, using [2-(13)C]glycine a 27% reduction in de novo glutathione synthesis was observed in the presence of the gliotoxin. Incubation of the cells with L-serine-O-sulphate reduced the activity of alanine and aspartate aminotransferase by 53% and 67%, respectively. Collectively these results show that the gliotoxin, L-serine-O-sulphate, causes major disruptions to metabolic pathways in primary cultures of astrocytes.
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Affiliation(s)
- Lorraine Brennan
- UCD School of Biomolecular and Biomedical Sciences, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
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Guiramand J, Martin A, de Jesus Ferreira MC, Cohen-Solal C, Vignes M, Récasens M. Gliotoxicity in hippocampal cultures is induced by transportable, but not by nontransportable, glutamate uptake inhibitors. J Neurosci Res 2005; 81:199-207. [PMID: 15931685 DOI: 10.1002/jnr.20557] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Extracellular glutamate is kept below a toxic level by glial and neuronal glutamate transporters. Here we show that the transportable glutamate uptake inhibitor L-trans-pyrrolidine-2,4-dicarboxylate (t-PDC) induced cell death in mature, but not in immature, hippocampal neuron-enriched cultures. The cell death produced by a 24-hr treatment with t-PDC was dose-dependent and reached 85% of the cell population at a 250 microM concentration at 23 days in vitro (DIV). Immunocytochemistry experiments showed that, under these experimental conditions, t-PDC killed not only neurons as expected but also glial cells. The N-methyl-D-aspartate (NMDA) antagonist D-2-aminophosphonovalerate (D-APV; 250 microM) only partially reversed this toxicity, completely protecting the neuronal cell population but not the glial population. The antioxidant compounds alpha-tocopherol or Trolox, used at concentrations that reverse the oxidative stress-induced toxicity, did not block the gliotoxicity specifically produced by t-PDC in the presence of D-APV. The nontransportable glutamate uptake inhibitor DL-threo-beta-benzyloxyaspartate (TBOA) elicited cell death only in mature, but not in immature, hippocampal cultures. The TBOA toxic effect was dose dependent and reached a plateau at 100 microM in 23-DIV cultures. About 50% of the cell population died. TBOA affected essentially the neuronal population. D-APV (250 microM) completely reversed this toxicity. It is concluded that nontransportable glutamate uptake inhibitors are neurotoxic via overactivation of NMDA receptors, whereas transportable glutamate uptake inhibitors induce both an NMDA-dependent neurotoxicity and an NMDA- and oxidative stress-independent gliotoxicity, but only in mature hippocampal cultures.
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Affiliation(s)
- Janique Guiramand
- CNRS FRE 2693, Laboratoire de Plasticité Cérébrale, Université Montpellier II CC90, Montpellier, France.
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